Mounting for rock drills



July 7, 1931. G. M. NELL MOUNTING FOR ROCK DRILLS Filed April,.-l2, 1929 A TTORNE Y.

Patented July 7, 1931 PATENT oFFic GUSTAVE M. NELL, OF DETROIT,

MICHIGAN, ASSIGNOR TO CHICAGO PNEUMATIC TOOL COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY MOUNTllNG FOR ROCK DRILLS Application filed April 12,

This invention relates to rock drilling equipment and more particularly to apparatus for mechanically supporting power machines and tools in drilling, mining, quarrying, and similar operations. Still more specifically it is concerned with saddle or clamping devices for use on supports such as column arms in tunnelling and the like.

One object of the invention is to provide supporting apparatus of the described type which is capable of quick change and adjustment with a minimum of efi'ort and trouble. Another object is to devise a saddle mounting for rock drills having improved features of simplicity and security during adjustment. Other objects will be apparent from the detailed description which follows.

This invention comprises a saddle or clamping device for engaging a column arm or other support and having a single securing member for performing the double function of applying clamping pressure and ofholding a guide shell or other support for a drilling machine in adjusted position upon the saddle. The invention further involves means for maintaining suficient clamping pressure on the saddle to hold it in place when the said single securing member is loosened to permit adjustment ofthe guide shell or support. By preference such means is resilient in character, capable of convenient adjustment, and may take the form of a bolt having a spring thereon for applying the resilient clamping pressure.

In order to illustrate the invention a preferred embodiment thereof is shown in the accompanying drawings, in which: 7

Fig. 1 is a top plan view of a guide shell secured by a saddle mounting to the arm of a mine column, the latter being shown in section;

Fig. 2 is a side elevational view of the parts shown in Fig. 1 with portions of the guide shell and saddle in section; and

Fig. 3 is a right end elevational view of the saddle with portions of the shell mounting in section substantially on the line 3-3 of Figs. 1 and 2.

In the embodiment of the invention chosen for the purpose of illustration, a guide shell 1929. Serial No. 354,513.

mounting indicated generally by reference character A is secured by a saddle device B to an arm 00 clamped upon a vertical mine column y. Guide shell A is of conventional form but has as its base a tapered projection a which has telescoping engagement with a similarly tapered socket or recess 1) in the saddle B. A single securing member or bolt 4 has the dual function of securing guide shell A to saddle B and of clamping the latter upon supporting arm m Saddle B comprises clamping jaws 5 and 6 pivoted or hinged together by a pivot pin or bolt 7 and shaped adjacent the hinge to I enclose supporting arm 00. Jaw 5 provides the tapered recess .7) for projection a of the guide shell and jaw ,6 has an opening 6a through which bolt 4 projects. A nut 4a, when set up, not only draws projection a deeper into socket b but also forces clamping jaws 5 and 6 together in an obvious manner.

Additional means are provided on jaws 5 and?) to apply a constant resilient clamping force thereto so that nut ia may be loosened to adjust the position of the guide shell without any change in position of saddle B. Such means may take the form of a bolt 8 eXtending through aligned perforations in jaws 5 and 6 adjacent the free ends of the same and provided on its outer end with an adjusting nut 9. A coil spring 10 interposed between nut 9 and jaw 5 yieldingly forces the two jaws together. To prevent loosening of the parts under vibration, jaw 6 has a lug or projection 66 which engages one of the flats on the head of bolt 8 and spring 10 has p rojections 10a at each end, which projections fit into suitable sockets or notches in jaw 5 and nut9, respectively, to lock the same in adjusted position. Nut 9 is set up until the clamping pressure exerted by spring 10 forces the jaws or halves 5 and 6 of saddle B together with suflicient friction on arm a: to hold the saddle and the guide shell against movement relative to arm at under the force of gravity but does permit adjusting movement when desired by the exertion of limited additional force on guide shell by the operatoryafter nut 4a ofthe clamping and securing bolt 4 is loosened for the purpose of swiveling or adjusting guide shell A relative to saddle B. It is thus apparent that once the proper adjustment is made of the tension of spring 10 the complete saddle and guide shell can be readily adjusted by loosening only one nut, namely 4a, and that the guide shell may be swiveled in its cone seat without varying the relative position of the saddle upon the supporting arm.

While the invention has been herein disclosed in What is now considered to be a preferred form, it is to be undersood that the invention is not limited to the specific details thereof but covers all changes, modifications, and adaptations within the scope of the appended claims.

I claim as my invention:

1. The combination with a guide mounting for a percussive machine, of a saddle device for securing the same to a column arm or similar support having clamping members hinged together at one end for engaging said arm or support, a single member having the dual function of securing the guide mounting to said device and of applying clamping pressure to said clamping members, and means for applying a constant yielding clamping pressure to said clamping members, said single member being intermediate said means and the hinged joint of said clamping members.

2. The combination with a guide mounting for a percussive machine, of a saddle device for securing the same to a column arm or the like having clamping members for engaging said arm, a single member having the dual function of securing the guide mounting to said device and of applying clamping pressure to said clamping members, and resilient means independent of said single member engaging said clamping members for maintaining frictional engagement of the same with said arm or the like to permit loosening of said single member for adjusting the posi tion of said guide mounting.

8. The combination with a guide shell having a tapered projection, of a saddle device for securing the same to a column arm or the like, said device having a tapered socket to receive said projection and hinged clamping jaws to engage said arm, a pivot bolt secured to said projection and engaging one of said clamping jaws with the dual function of securing said shell to said device and of applying clamping pressure to said jaws, and resilient means in spaced relation with said bolt applying a predetermined pressure to said jaws to hold said device in place while said bolt is being loosened to adjust the position of said shell.

4. The combination with a guide shell having a tapered projection, of a saddle device for securing the same to a column arm or the like, said device having a tapered socket to receive said projection and hinged clamping jaws toengage said arm, a pivot bolt semounting on a cured to said projection and engaging one of said clamping jaws with the dual function of securing said shell to said device and of applying clamping pressure to said j aws, and means independent of said bolt for applying a constant, yielding, clamping pressure to said jaws.

5. The combination with a guide shell having a tapered projection, of a saddle device for securing the same to a column arm or the like, said device having a tapered socket to receive said projection and hinged clamping jaws to engage said arm, a pivot bolt secured to said projection and engaging one of said clamping jaws with the dual function of securingsaid shell to said device and of applying clamping pressure to said jaws, means including a spring for applying a constant clamping-pressure to said jaws, and means independent of said bolt for adjusting the tension of said spring.

6. The combination with a i g a tapered projection, of for securing the like, said device receive said projection and hinged clamping jaws to engage said arm, a pivot bolt secured to said projection and engaging one of said clamping jaws with the dual function of securing said shell, to said device and of applying clamping pressure to said jaws, a second bolt extending through aligned openings in said aws, an adjusting nut on the outer end of said bolt, and a coil spring encircling said bolt between said nut and one of said jaws.

7. A saddle device for supportinga shell column arm or the like comprising clamping jaws having curved sockets shaped to fit the column arm, said jaws being pivoted together at one end, means for adjustably securing a guide shell to said device, and means independent of said first named means and disposed at the free ends of said jaws for applying a constant yielding clamping pressure to the latter.

Signed by me at Detroit, in the county of VVa-yne, and State of Michigan this 8 day of April, 1929.

GUSTAVE M. NELL.

guide shell hava saddle device same to a column arm or the having a tapered socket to 

